Alloy Indefinite Chilled Cast Iron Rolls

Alloy Indefinite Chilled Cast Iron Rolls is a cast iron with fine inter crystalline graphite evenly distributed throughout the working layer of roll barrel. The sizes, shapes and distributions of graphite and carbide are controlled by the chilling effect and the contents of alloy elements. The addition of alloy elements such as Manganese, Nickel, Chromium and Molybdenum changes the matrix microstructure from pearlite, bainite to martensite. The present of small amount of fine graphite enhances the roll’s resistance to spalling, thermal crack and wear ability. This roll has small hardness gradient in the working layer of roll barrel and is suitable to medium and finishing stands for bar, wire and section mills.

Application of Alloy Cast Steel Rolls include

• Rolls for intermediate and finish stands of section mills, bar and rod mills, hot strip mill
• Medium & heavy plate mills, hot strip mills, work rolls, skin pass rolls

Chemical Composition
Hardness	C	Mn	Si	Ni	Cr	Mo	UTS Kgf/mm.sq
30-40	0.60/0.90	0.60/.0.90	0.20/0.50	0.50 MAX	0.80/1.10	0.25/0.40	70-75